diff --git a/ext/pdo_sqlite/config.m4 b/ext/pdo_sqlite/config.m4
index 371b32798c0..cacd0de083a 100644
--- a/ext/pdo_sqlite/config.m4
+++ b/ext/pdo_sqlite/config.m4
@@ -7,6 +7,9 @@ if test "$PHP_PDO" != "no"; then
 PHP_ARG_WITH(pdo-sqlite, for sqlite 3 driver for PDO,
 [  --without-pdo-sqlite      PDO: sqlite 3 support],yes)
 
+PHP_ARG_WITH(pdo-sqlite, for sqlite 3 support for PDO,
+[  --with-pdo-sqlite[=DIR]   PDO: sqlite support. DIR is the sqlite base directory, the bundled sqlite is used by default])
+
 if test "$PHP_PDO_SQLITE" != "no"; then
 
   ifdef([PHP_CHECK_PDO_INCLUDES],